Press



J. W. BISHOP Dec. 27, 1932.

PRESS Filed Jan. 25. 1950 4 Sheets-Sheet Dem 27, 1932. L W BISHOP 1,892,134

PRESS Filed Jan. 25, 1930 4 Sheets-Sheet 2 if i JWM/5M@ Dec. 27, 1932. 1 W BlsHOp 1,892,134

PRESS Filed Jan. 25. 1930 4 Sheets-Sheet 4 Patented Dec. 27, 1932 UNITED STATES PATENT OFFICE JOSEPH 1V. BISHOP, 0F MUSKEGON HEIGHTS, MICHIGAN, ASSISI-NOR, BY ."LvIESNE ASSIGN- LIENTS, T0 UNITED RESEARCH CORPORATION, 0F LONG- ISLAND CITY, NEW YORK, A

CORPORATION OF DELAWARE PRESS Application filed January 25, 1930. Serial No. 423,527.

My invention relates to a molding press and more particularly to a press of the type employed in the manufacture of phonograph records.

One object of my invention is to provide an especially simple and reliable guard or safety device for quickly checking the closing operation of the press. l

Another object of my invention is to provide a simple safety device for rendering inoperative power driven cams and associated mechanism which normally operate to close the press.

A further object of my invention is to provide a device for facilitating the removal of a mold from the press to the front thereof to permit ready access to its face.

Other objects and advantages will appear as the description proceeds.

. Referring to the accompanying drawings Fig. l is a side elevational view of a press embodying my invention;

2 is a rear elevational view on a slightly enlarged scale, of the press shown in Fig. 3 is a plan view on a slightly enlarged scale, of the press shown in Fig. 1;

4 is a diagrammatic view of valves for controlling the admission of low pressure Huid and its discharge from the press;

Fig. 5 is a diagrammatic view of valve for controlling the admission of high pressure fluid to and from the press;

Fig. 6 is a diagrammatic view of'valve for controlling theadmission of steam and cooling-water to the molds;

Fig. is a diagrammatic view of devices for controlling the low-pressure-iiuid intake valve;

Fig. 8 is a diagrammatic view of devices for controlling the low pressure release valve;

Fig. 9 is a diagrammatic view of devices for controlling the steam and cooling-water and the high-pressure-luid intake valves;

Fig. 10 is a diagrammatic view of cams for actuating the various valves, showing the angular relationship of the cams;

Figll is a detail view of a release trigger with the interior of which a pipe 3 com- Y municates, extending to a valve casing 4. The valve casing has therein a valve 5 which controls the discharge of water from the cylinder to an exhaust pipe 6. The valve casing also has an inlet valve 7 which controls the flow of fluid, under relatively low pressure, to the cylinder from a supply pipe 8.

A check valve 11 is also provided in the casing for preventing iiuid under a relatively high pressure developed in a member presently to be described, from backing up and opening the inlet valve 7 and discharging into the pipe 8. i

A pipe 12 connects the pipe 3 to a valve casing 13 having therein an inlet valve 14 which controls the admission to the cylinder 2 of fluid under relatively high pressure from a main 15. A valve 16 also in the casing 13 controls the discharge from the cylinder of fluid under relatively high pressure.

The cylinder 2 supports a cross-head 17 by means of columns 18 and receives a piston 19 which carries a block 20. The piston 19 has a pair of upstanding guides 21 for a block 22 therebetween, which is slidable from front to rear and carries a roller 23. The roller serves as a fulcrum for a platen 24, the lower portion of which is shaped to lie on the surface of the roller and is movable thereabout in the up and down movement of the piston. The platen has downward and rearward extensions 25, each pivotally mounted on a cross-bar 26 which is secured at its ends to a pair of sleeves 27 slidable on the rear columns 18.

A rod 28 is secured to the cross-bar 26 and extends through an opening (not shown) in an extension 30 on the rear of the cylinder and has a nut 31 on its lower end between which and the extension a spring 32 is compressed. The spring tends to prevent crossbar 26 from rising when the platen is in the open position shown in dotted lines in Fig. 1 and retains the cross-bar in lowered position engages the cam 52.

while the platen is rising until abutments 32 on the platen engage the rear columns 18 when an upward movement ot' the platen causes a compression of the spring.

A hollow mold 33 is secured to the platen and a flexible outlettube 34 communicates with its interior and extends to a discharge pipe 35.

A ilexible tube 36 also connects the discharge pipe to a hollow mold 37 detachably secured to the underside of the crosshead by means of bolts 38 (Fig. Each of the molds has a matrix o9 secured thereto by suitable devices (not shown).

The mold 37 has a pair of rollers 40 on each side received in grooves 41 in tracks 42 which are supported by the platen and extend forwardly -to the front thereof. The tracks have upwardly extending Jfront portions 43 .Which enable the operator to tilt the mold upwardly to the position shown in dotted lines in Fig. 1 and expose its face for clean` ing or the substitution ot a new matrix. Each of the grooves has a dip 44 in it for receiving the lower roller when the mold is thus tilted and holding it against accidental removal.

An inlet pipe 45 communicates with the molds and extends to a va ve casing 46 having valves 47 and 48 therein which control the admission of steam and water, respectively, to the pipe 45 from pipes 49 and 49, respectively.

Each of the valves is provided with a respective stem 50 and is urged towards closed position by a spring 51.

'For actuating the valves 5, 7 16, 14, 47, and 48 a series of cams 52, 53, 54, 55, 56, and 57, respectively, are provided, mounted on a rotary shaft 58 journaled in a support 60.

For actuating each of the valves 47 48 and 16, rocker arms 61, one for each valve, are provided (Fig. 9). Each of these rocker arms has a roller 62 thereon which engages the corresponding actuating cam. The Vupper vend of the rocker arm engages the stem 50 of the valve.

For Aactuating the lowpressureluid release valve 5 a rocker arm 63 is provided (Figs. 1 and 8), having a roller 64 which A minor arm 65 is pivoted on the rocker arm 63 and engages the stem 50 of the valve 5 and is held in posi* tion by a cam 66 pivoted on the rocker arm 63. A link 67 connects one end of the cam `66 to a cross-piece 68.

For operating the low-pressure-iiuid intake valve 7 a rocker arm 70 is provided (Fig. 7) having a roller 71 thereon which engages the cam 53. A small arm 72 pivoted on the rocker arm engages the valve stem 50 and is maintained in fixed position with respect to the rocker arm 70 by means of a trigger 73 which is pivoted on the rocker arm 70 and is connected by a link 74 to the crosspiece 68.

The cross-piece 68 is connected by a rod 75 to a leve;l 76 on a shaft 77 mounted to turn in bearings 78 on the cross-head 17.

For actuating the higli-pressuie-intake valve 14 a rocker arm and associated parts are provided which are duplicates of those above described in connection with the lowpressuretluid intake valve 7. lnstead of a link 74 however a somewhat longer rod 80 (Fig. 2) is provided which is connected to an arm 81 rigid with the shaft 77. A link 82 pivoted on the arm 81 extends upwardly through an opening in a support 83 and has a nut 84 threaded on its upper end and is surrounded by a spring 85 compressed between the nut 84 and the support 83.

The lever 76 may be swung downwardly by the manual elevation of a handle 86 secured Vhead 17.

Anarm 90 is secured to the shaft 88 and i is connected by a link 91 to an arm 92 on a shaft 93 which is mounted in bearings 94.

A pair of arms 95 are secured to the shaft 93 and extend forwardly therefrom and are vconnected at their forward ends by a vertical release bar 96 which is disposed at the front of the press. The arms 95 and the arm 92 move together and constitute a simple lever.

An additional release bar 97 (Fig. 3) is provided at the other side of the front of the press and is connected by devices, similar to those just described in connection with release bar 96, to an arm 98 which is secured to the shaft 88. Among these connecting devices is an arm 100 which is similar' to the arm 92 excepting that it extends inwardly over the press, whereas the arm 92 is outwardly directed.

The arms 92 and 100 are given the described positions in order that the release bars 96 and 97 may be moved, in unison, outwardly away from the iront of the press.

facture or phonograph records, but it will be '7' understood that the press may be used in the manufacture of articles of various descrip tions, such, for instance, as toilet seats.

At the beginning of a cycle of operations of the press the platen 24 is in the lower, or 7 dotted line, position shown in Fig. 1. At this time all of the valves are closed excepting the low and high pressure luid release valves, which are open.

The operator places a quantity of stock on the lower mold 33 and the rotation of the power-driven shaft 58 moves the cams thereon. The first valve operated is the highpressure-fluid release valve 16 which is permitted to move to closed position, the movement of the cam 55 permitting the rocker arm to move in a counter-clockwise direction as viewed in Fig. 7.

Immediately after the closing of valve 14, the steam intake valve 47 is moved to open position by the cam 56 which moves the rocker arm 61 in a clockwise direction as viewed in Fig. 9.

The opening of the valve 47 permits the steam to enter the pipe 45, by which it is conducted to the molds 37 and 33 throughwhich it iiows and from which it is discharged into the tubes 36 and 34.

The low-pressure-iiuid release valve 5 is next permitted to move to closed position, the movement of the cam 52 permitting the rocker arm 63 to move in counter-clockwise direction as viewed in Fig. 8.

The lo-w-pressure-iluid intake valve 7 is then moved to open position by the action of the cam 53 and fluid under low pressure is admitted from the pipe 8 to the pipe 3 which conducts it to the cylinder 2. The piston 19 then begins to rise, causing the platen 24 to tilt upwardly until it assumes a substantially horizontal position and the abutments 32 engage the rear columns 18. The abutments 32 then slide along the surface of the columns 18, the platen 24 being maintained in a horizontal position as it is moved upwardly. The spring 32 is compressed by the upward movement of the rod 28 in unison with the platen 24.

`While the press is closing the steam intake valve 47 is permitted to move to closed position by the action of vcam 56 and the admission of steam to the molds 33 and 37 is discontinued.

After the press is closed, the high-pressureuid intake valve 14 is opened by the action of the cam 55, permitting fluid under high pressure to flow from the main 15 thru the pipe 12 and into the pipe 3. The coolingwater intake valve 48 is then opened by the action of the cam 57 and the cooling water is fed from the pipe 49 to the pipe 45 which conducts it to the molds.

The low-pressure-fluid intake valve 7 is then permitted to move to closed position by the action of the cam 53, and the application of the high pressure fluid to the pist-on 20 increases the pressure between the molds 33 and 37.

The high-pressure-fluid intake valve 14 is then permitted to move to closed position by the action of the cam 55 and immediately thereafter the high-pressure release valve 16 is opened. Then the low-pressure valve 5 is opened and the cooling-water intake valve 48 is closed.

The piston 19 begins to Vlower when the high-pressure-iiuid release valve 14 is opened, and the platen 24 is lowered to the dot-ted line position indicatedV in Fig. l, at which time the operator may remove the completed record.

If desired, the shaft`58 may be rotated with uniform speed, or it may be caused to complete one revolution and may then be brought to a stop. v

. If at any time when the press is being closed, the operator should desire to arrest the operation, as, for'instance, in case of accident, he may do so,.immedia'tely, by pushing either of the release bars 96 or 97, the movement of which is at once communicated to the arms and 98,' which swing the trigger 87 out of the way of the lever 7 6 and permit instantaneous action of the spring 85 to elevate the arm 81 and rock the shaft 77, thus lifting the links 67, 7 4, and 80.

The movement of the link V67 moves the cam 66 and swings the arm 65 in a clockwise direction as viewed in Fig. 8. This opens the low-pressure-Huid release valve 5 and permits the discharge of water from the cylinder 2.

The elevation of the link 74 trips the trigger 73 and permits the arm 72 to move in a connter-clockwise direction as viewed in Fig.7. A similar operation occurs as the result of the elevation of the rod 80, so that the high and low pressure Huid intake valves 7 and 14 are simultaneously moved to closed position.' If the release bar 96 or 97 has been actuated, it may be readily re-set to the operative position shown in Fig. 3 irrespective of the position which the cams may have assumed by reason of any movement of the shaft 58. To re-set the release bars 96 and 97 it is merely necessary for the operator to manually raise the handle 86, thus rocking the shaft 77` which permits the operator to swing the release bars to their normalposition, this action causing the trigger 87, by reason of the operative connections between it and the release bars. to resume its position in engagement with the upper end of the lever 76.

When the operator raises the handle 86, the lever 76 and the arm 81 are moved downwardly and the links 67, 74, and 8O cause the trigger 73 and the cam 66 to assume the positions shown in Figs. 7 and 8. The press is then in normal operative condition and when the cycle of rotation of the shaft 58 is completed the normal operations of the press as above described may again be performed.

From the above description it will be apparent that I have provided an especially simple and reliable safety device for rendering inoperative the power-driven cams and associated mechanism which normally operlate to close the press.

The invention is not limited to the details of construction of the device illustrated and described, but it is contemplated that the described press may be extensively modified ipo los

if 'a without departing from the spirit of the invention. For instance, the movable platen may be given a simple up-and-down motion, if desired, without being tilted. A substantial range of equivalents is contemplated within the scope of the appended claims.

lVhat I claim as new and desire to protect by Letters Patent is l. In a press, the combination of a fixed platen, a movable platen, means for applying fluid under low pressure to said movable platen for pressing it against said fixed platen, means for applying fluid under high pressure to said movable platen, means for releasing fluid pressure from said movable platen, power driven shaft, a series of cams on said shaft, one for each of said means, and operative connections between each of said cams and` the corresponding means whereby said means are actuated in the sequence in which they are above recited, at regular predetermined time intervals.

2. In a press, the combinationof a fixed platen, a meld normally supported underneath said fixed platen, a platen movable upwardly into compressive relation with said mold, and an overhead support 'for said mold in front of said press having a horizontal portion and a vertical portion adapted to permit withdrawal and rotation of said meld while supported.

3. In a press, the combination of a fixed platen, a mold normally7 supported 'underneath said platen, a platen movable upwardly into compressive relation with said mold, and a pair of tracks having upwardly eX- tending ends, one on each side of said mold, extending to the front of said press, whereby said mold may be moved forwardly to permit access to the face by rotation thereof.

4. In a press, the combination of a fixed platen, a mold' detachably secured vunderneath said platen, a platen movable upwardly into compressive relation with said mold, a pair of rollers on each side of said mold, and a track having upwardly turned ends for each pair of rollers extending forwardly to the front of said press to permit said mold to be rolled forwardly to the front of said press and tilted upwardly on said track to expose its face.

5. In a press, means for applying and releasing pressure, automatic means for controlling` the application and release for said pressure` and manual means cooperating therewith,f0r preventing the applicaiton of further pressure and releasing pressure already applied.

Y G. In a press, means for applying' and releasing pressure, power actuated means for cyclically controlling the application and release of said pressure, and means cooperating' therewith for simultaneously7 interrupting said cycle, and releasing any pressure which may have been applied. 1

my naine.

JOSEPH W. BISHOP. 

